한국정밀공학회지 제 30 권 8 호 pp. 785-789 J. Korean Soc. Precis. Eng., Vol. 30, No. 8, pp. 785-789 ISSN 1225-9071(Print), ISSN 2287-8769(Online) August 2013 / 785 http://dx.doi.org/10.7736/KSPE.2013.30.8.785 ◆ 특집 ◆ 최신 정밀 설계재료 기술 Ⅱ 장구형 웜기어를 이용한 감속기 설계 Design of a Reduction Gear using Double-Enveloping Worm Gear 김태우 1 , 황영국 2,, 이춘만 1 Tae Woo Kim 1 , Young Kug Hwang 2,, and Choon Man Lee 1 1 창원대학교 기계공학부 (School of Mechanical Engineering, Changwon National Univ.) 2 조선이공대학교 메카트로닉스과 (Department of Mechatronics, Chosun College of Science & Technology) Corresponding author: [email protected], Tel: +82-62-230-8294 Manuscript received: 2013.5.20 / Accepted: 2013.6.17 Worm gear sets may be either single- or double-enveloping. In a single-enveloping set, the worm wheel is cut into a concave surface, thus partially enclosing the worm when meshed. The double- enveloping worm gear is similar to the single-enveloping gear; however, the worm envelopes the worm gear. Thus both are throated. The double-enveloping worm gear has more of the tooth surface in contact than the single-enveloping worm gear. The larger contact area increases the load-carrying capacity. For this reason, double-enveloping worm gearing is widely applied in heavy-duty machinery, for applications including construction and metallurgy. In this paper, we designed a compact reduction gear that is highly efficient using double-enveloping worm gears. We calculated the bearing load in the worm gearing to select the bearing and the housing surface area according to the recommended values from AGMA(American Gear Manufacturers Association). The finite element method was used to assess the structural integrity. Key Words: Double Enveloping Worm Gear (장구형 웜기어), Reduction Gear (감속기), Finite Element Analysis (유한요소 해석), Bearing Load (베어링 하중) 기호설명 W t = Tangential force W r ' = Separating force W x = Worm thrust force P h = Input power in horsepower n w = Rotations per minute of the worm d = Pitch diameter of the worm α n = Normal pressure angle λ = Worm lead angle f n = Rotational speed coefficient f h = Service life coefficient L 10h = Rated fatigue life C r = Basic dynamic load rating P = Dynamic equivalent load X, Y = Radial and axial load factor F r , F a = Radial and axial load 1. 서론 감속기는 최대의 효율을 가지고 구동축에서 종 동축으로 토크와 속도를 전달하고 변경하는 기능 을 가지며 오늘날 대부분의 산업현장에서 폭넓게 사용되어 지고 있다. 1-6 이들 감속기는 동력전달 방
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장구형 웜기어를 이용한 감속기 설계 · 한국정밀공학회지 제 30권 8호 pp. 785-789 August 2013 / 789 3. 결론 장구형 웜 기어를 이용한 감속기 개발을
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한국정밀공학회지 제 30 권 8 호 pp. 785-789
J. Korean Soc. Precis. Eng., Vol. 30, No. 8, pp. 785-789
ISSN 1225-9071(Print), ISSN 2287-8769(Online)
August 2013 / 785
http://dx.doi.org/10.7736/KSPE.2013.30.8.785
◆ 특집 ◆ 최신 정밀 설계재료 기술 Ⅱ
장구형 웜기어를 이용한 감속기 설계
Design of a Reduction Gear using Double-Enveloping Worm Gear
김태우1, 황영국
2,�, 이춘만
1
Tae Woo Kim1, Young Kug Hwang
2,�, and Choon Man Lee1
1 창원대학교 기계공학부 (School of Mechanical Engineering, Changwon National Univ.)
2 조선이공대학교 메카트로닉스과 (Department of Mechatronics, Chosun College of Science & Technology)